The model, who recently returned from a trip to Mexico with sister Khloe Kardashian, posted a NSFW picture of someone bending over and exposing their butt in a pair of stockings and heels, while rolling around on a back seat of a car on Friday morning.

And we’re not surprised Kendall is “scared” about what’s to come, if Kylie’s 17th birthday celebrations are anything to go by, this weekend will be pretty wild.

Last year she threw a star-studded bash at The Rainbow club in Hollywood, where she partied alongside Chris Brown, The Game and Justin Bieber.

“There was a penis-shaped cake, a video of people doing shots in the club and Justin sang her happy birthday, so we can’t wait to see how Kylie tops that.

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